Improvement in machines for milling metal



Machines for Milling Metal. NO ISOM. y lPatentedIV1a1y5,1874.

3 Sheets--Sheet 2.

W. HA W K I N S. M ach i nes for Milling 4M etal.

Patented May 5,-1874 w Q A@ hw QN.. (fr, .w l .N Os. IN

L M @www "W. HAWKl-NS. Y Y Machines for Milling Metal.

NOOJH,` Y Patented May 5,1874.

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WILLIAM HAwKINs, or sAN rRANcIsoo, CALIFORNIA.

IMPROVEMENT IN MACHINES FOR MILLING METAL.

Specification-forming part of Letters Patent No. 150,416, dated May 5, 1874; application filed August 9, 1871.

To all lwhom At may concern:

Be it known that I, WILLrAM HAwKINs, of the city of San Francisco, in the State of California, have invented Improvements in Milling-Machines, of which the following is a speciiication:

The object of my invention is to provide a milling machine so constructed as to cut grooves in saw-teeth or other metallic substances, straight, in circles, or on angles. It also relates to cutting straight and turning a curve or angle, at anydesired point, at one operation, with the view of avoiding certain disadvantages in most milling-machines.

To more fully explain my invention,"refer ,ence is had to the 1accon'ipanying drawing, of

Figure 1 is a side elevation of the machine. Fig. 2 is a plan. Fig. 3 is an end view. Fig. 4 is a plan of eccentric and plate. Fig. 5 is a section of bolt, and view of screw-wheel, and section of movable head. Fig. 6 is aface view of -screw wheel, showing recesses with steel plates.

A indicates the frame or bed-plate, which should be substantially constructed to form a good foundation for the cutter-heads; B, the adjustable head, adjusted by means of the screw G. D is the screw-wheel, well secured to shaft a, and worked by screw pinion b b. (See Fig. 3.) H is a movable head that is tted to B, that can be moved both forward and backward. E is a movable plate, well iitted inways to the face of the screw-wheel D, and is worked by the screw V. F is an open jaw or clamp that holds a saw-tooth, and is secured to plate E, and `-so arranged as to hold the tooth, and be freely revolved around cutter Q. The screws c c hold the Vsaw-tooth in position in a firm manner in the -jaw F. D D are adjusting-screws, to determine the position of plate E, in order to regulate the sizeof the circle or angle to be cut. e ek is an adjustable gage, to regulate the position of the work or V tooth to be out; ff, an adjustable gage, to regulate the position of the work. G is a collar on the shaft a of the wheel D, and serves a double purpose-rst, as a collar` of shaft in the movable head H 5 and, secondly, by its teeth h h, as gear, to work the sliding wedge g g. This sliding wedge moves the bolt I to release the head H, which is otherwise kept loclred by that bolt through the medium of a spring. j

At the commencement of cutting circles the bolt J is forced away from the wheel D by the eccentric j j, the movement being effected by the hand of the operator.

The bolt J is for the purpose of holding the wheel D firmly, the end thereofv entering a socket or recess, i t', when the proper angle or shape of the saw-tootl1 or piece of metal to be grooved or milled is given.) The bolt J is forced toward the wheel D` by the spring K.

By Fig. 2 is shown a shaft, L, with lever k 7G and lever l Z. The lever 7c Ic is moved by proj ection T on collar G. Such movement brings in action lever Z Z, which acts against the handle or lever of the eccentric j j, giving it` an outward movement that allows the spring K to come into play, and force the bolt J toward the head D. on m (see Fig. 6) are steel plates, that come against bolt J, and hold wheel D iirm and secure while cutting' or milling. In Fig. 3 is shown a saw-tooth, S, held in the jaw F iirm and secure by screws c c. M is the base of a standard secured to frame A. N are slidingboxes,well fitted and secured to standard M. O is a band-wheel that carries movement to shaft I?. Q is a cutter or milling tool. R

is a screw to adjust the cutter-head or sliding' boxes. V

My improved machine is for cutting grooves or straight lines, and then turning a curve or circle or angle at any desired point, making a complete curve, and finishing a tooth or the work at one operation, and is found sufiicient and well secured to resist all cutting pressure.

What I claim as my invention is 1. The traveling head H, with its adjustingscrew R and bed B, in combination with the partially -rotating wheel D, adjustable plate E, with its clamp F, and adjusting -screw V, all constructed and arranged so as to allow a double adjustment of the clamp without interfering with its rotation, as w, for automatically releasing the bolt J, as deset forth. scribed.

l 2. lThe sliding bolt I, in combination with This specication signed this 10th day of the head H, the Wheel D, plate E, and June, 1871.

clamp F, as and for the purpose set forth. WILLIAM HAWKINS.

3. The combination of the collar Gr with Witnesses: its projections T, the rock-shaft L, having A.y B. CLASON,

thelevers 7c k and Z Z, the handlej j, and spring J. H. BOONE. 

